The tetraphenylboron sodium gravimetric method must be employed when K2O is higher in compound fertilizer for enough accuracy.

当复混肥中K2O时,仍宜用四苯重法测定。

METHODS Sodium tetraphenylboron gravimetric analysis was replaced by highly-accurate nephelometric titrimetry to determine potassium chloride in Compound sodium chloride injection.

方法用精度散射光度滴定法代替四苯钠重法。